Question

In: Physics

A ski starts from rest and slides down a 24 ∘ incline 95 mlong. Part A...

A ski starts from rest and slides down a 24 ∘ incline 95 mlong.

Part A

If the coefficient of friction is 0.085, what is the ski's speed at the base of the incline?

Express your answer using two significant figures.

Part B

If the snow is level at the foot of the incline and has the same coefficient of friction, how far will the ski travel along the level? Use energy methods.

Express your answer using two significant figures.

Expert Solution

A)

FR denotes the frictional force force and FN is the normal force.

If is the coefficient of friction then,

From the diagram it is evident that,

Hence, the force due to friction is

Initially the ski is at rest and has Potential energy only.

Hence, by the principle of conservation of energy,

however the final energy is not only Kinetic energy but also the work done due to friction

If l is the length of the ramp, work done due to friction is

If v is the speed of the ski at the base of the incline, putting the values,

B) Let after coming down the ramp it traverses a distance d

Applying the principle of conservation of energy,

genius_generous answered 6 months ago

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